Type-writing-machine attachment



(ModeL) H. O. HOOPER.

TYPE WRITING MACHINE ATTACHMENT.

No. 427,688. Patented May 13, 1890.

UNITED STATEs PATENT OFFICE.

HENRY OTIS IIOOPER, OF SAN FRANCISCO, CALIFORNIA.

TYPE-WRlTlNG-MACHINE ATTACHMENT.

SPECIFICATION forming part of Letters Patent NO. 427,688, dated May 13,1890.-

Application filed May 17, 1888. Serial No. 274,213. I (Model) To allwhom it may concern:

Be it known that I, HENRY OTIS IIOOPER, of the city and county of SanFrancisco, State of California, have invented an Improvement inType-WVriting-Machine Attachments; and I hereby declare the following tobe a full, clear, and exact description of the same.

My invention relates to an attachment for type-writing machines for thepurpose of e11- ablin g the operator to inspect the work as fast as theletters are formed and without stopping and turning up the carriage forthis purpose.

It consists of a refracting-prism supported beneath theimpression-roller and the sheet which passes around it in such a mannerthat the refraction of light through the prism will present the lettersin their proper position to the eye of the writer.

Referring to the accompanying drawings for a more complete explanationof my invention, Figure 1 is a plan' view of a portion of thetype-Writer, showing the carriage and my attachment. Fig. 2 is averticalsection taken through the impression-roller and part of the.

carriage-frame, showing the mannerof applyin g my device.

A is the carriage of a Remington typewriter, to which in the presentcase I have shown my device as applied, and B is the impression-roller.

O is a roller upon which the front of the carriage is supported, thisroller traveling on the rail D at the front of the machine.

E is the shiftingrod of the machine, and F are the arms extending fromthe shaft G, which carries the tape-wheels H. The arms F have the lugs Iattached to their outer ends, these lugs extending down upon oppositesides of and clasping the shifting-bar.

In the present case I have shown a support J, to which is fixed theprismatic glass K,

which is ground with such angles as to refract the light from the lineupon which the type strikes the paper passing around theimpression-roller B, and the light is again thrown .outward through theconvex surface of the refractor, so as to show the letters right side upin their proper posit-ion, and also to somewhat magnify them, so thatthey can be clearly seen the instant they are formed.

The supporting-frame J may be attached in various ways to the carriage,it being manifest that with the different styles of machines differentmeans must be adopted for supporting the refractor. In the present casethe base J, upon which it lies, has arms L extending forward and havinghooks or yokes M, which rest upon the shifting-rod E and between thedownwardly-projecting lugs I, against which they abut on theinside, sothat as the carriage is moved it will carry the prism or refractor withit. Any equivalent contrivanee, however, may be employed to support theprism or refraetor and cause it to travel with the carriage, so as toalways retain its proper position with relation to the work which isbeing done.

I am aware that single refiectingsurfaces have been employed which wouldreverse the characters printed upon the paper, and I am also aware thattwo reflectors have been used in such relation to each other that thereversed characters would be thrown from the first upon the second, soas to bring them to the eye in their proper position. I do not claim,broadly, either of these devices.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is-

1. The combination, with a typewriter, of a transparent prism supportedwith relation to the impression-roller, so that the characters upon thepaper are refracted from its surfaces and presented in an uprightposition to the eye of the operator, substantially as described.

2. The combination, with a type-writer carriage, of therefracting-prism, supported so as to receive rays of light from thecharacters which are formed by the type upon the impression-roller andtransport them in an upright position to the eye of the operator, and amechanism by which ,the said prism is caused to travel with thecarriage, substan-- tially as described.

The transparent refractor, supported with relation to theimpression-roller and carriage of a type-writer and traveling with saidcarriage, said prism having the refracting and enlarging surfaces,substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

- HENRY OTIS HOOPER.

TVitnesses: A

S. M. HOOPER, M. B. HULL.

